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powerpc/mm/hash: Compute the segment size correctly for ISA 3.0 

PowerISA 3.0 encodes the segment size in the second half of hash page
table entry. Update hpte_decode() accordingly.

Fixes: 50de596de8 ("powerpc/mm/hash: Add support for Power9 Hash")
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Aneesh Kumar K.V 2016-05-19 13:24:30 +05:30 committed by Michael Ellerman
parent 9690c15742
commit 3b6d1eb7ea
1 changed files with 5 additions and 1 deletions
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6
arch/powerpc/mm/hash_native_64.c
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@ -550,7 +550,11 @@ static void hpte_decode(struct hash_pte *hpte, unsigned long slot,
}
}
/* This works for all page sizes, and for 256M and 1T segments */
*ssize = hpte_v >> HPTE_V_SSIZE_SHIFT;
if (cpu_has_feature(CPU_FTR_ARCH_300))
*ssize = hpte_r >> HPTE_R_3_0_SSIZE_SHIFT;
else
*ssize = hpte_v >> HPTE_V_SSIZE_SHIFT;
shift = mmu_psize_defs[size].shift;
avpn = (HPTE_V_AVPN_VAL(hpte_v) & ~mmu_psize_defs[size].avpnm);